I doubt anyone is producing them for profit. The profit margin is probably slim. Also, the trivial is low (135), so I doubt anyone is spamming these out for skillups. I'd suggest finding a High Elven smith and farming up the materials and asking them to do a combine for some reasonable commission. There might even be some High Elven smiths in <Castle>...it might be worth posting in #marketplace.
I clicked through the wiki article on it and it looks like one of these is required:
https://wiki.project1999.com/Moonlight_Temper
And extra of this:
https://wiki.project1999.com/Morning_Dew
Let us know if you make one.